Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Income Statement [Abstract]
Net sales	$ 257,175	$ 199,475	$ 773,376	$ 612,320
Cost of goods sold	173,544	135,472	517,453	414,700
Gross profit	83,631	64,003	255,923	197,620
Selling, general and administrative expenses	68,818	55,372	202,027	162,523
Operating income	14,813	8,631	53,896	35,097
Interest income, net	334	64	902	211
Income before income taxes	15,147	8,695	54,798	35,308
Income tax expense	5,268	3,248	19,724	13,256
Net income	$ 9,879	$ 5,447	$ 35,074	$ 22,052
Basic (loss) income per common share (dollars per share)	$ 0.18	$ 0.10	$ 0.64	$ 0.40
Diluted (loss) income per common share (dollars per share)	$ 0.18	$ 0.10	$ 0.63	$ 0.40
Weighted average shares outstanding:
Basic shares	55,215,850	54,871,172	55,148,316	54,809,768
Diluted shares	55,608,035	55,170,686	55,493,452	55,100,534